Animals
- Animals
Den Mothers: Bears shift dens as ice deteriorates
As Arctic ice has dwindled, pregnant polar bears in northern Alaska have become more likely to dig their birthing dens on land or nearshore ice than on floating masses of sea ice.
- Animals
Faker Crayfish: Males keep bluffing but don’t get caught
Some male Australian crayfish fake out their rivals by brandishing claws that look impressive but have little strength.
- Animals
Cat History: DNA study finds domestic-cat kin
DNA evidence shows that the Near Eastern lineage of the wildcat, one of five lineages of Felis silvestris, gave rise to today's domestic kitty cats.
- Animals
West Nile virus hits bird populations
West Nile virus has hammered populations of five common North American birds.
- Animals
Profiles in Courtship: Flirting male fish show their best sides
Courting male guppies that sport a tad more orange on one side of their bodies than on the other tend to flash that brighter side at females.
- Animals
Clownfish noisemaker is new to science
Clownfish make "pop-pop-pop" noises at each other by clacking their teeth together in a novel way.
- Animals
Moths mimic ‘Don’t eat me’ sounds
Moths that make clicking noises at predatory bats are mimicking a defensive signal made by other moths that click and also taste bad.
- Animals
Scary Singing: Precise birds signal, ‘Don’t mess with us’
A pair of magpie-larks can advertise their toughness by the precision of the duets they sing.
- Animals
Pothole Pals: Ants pave roads for fellow raiders
By throwing their bodies into tiny potholes on rough trails, army ants enable their comrade to race over them, improving the colony's overall foraging success.
- Animals
Virgin Birth: Shark has daughter without a dad
DNA testing of two sharks confirms an instance of reproduction without mating, adding a fifth major vertebrate lineage to those known for occasional virgin births.
- Animals
Low Life: Cold, polar ocean looks surprisingly rich
The first survey of life in deep waters around Antarctica has turned up hundreds of new species and a lot more variety than explorers had expected.
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